Low Point: Apollo 1 Crew Dies in Launchpad Fire

MPI / Getty

The burned remains of the aborted Apollo 1 mission

Jan. 27, 1967  Test pilots can sense straightaway if they're working with a
good vehicle or a bad one, and the Apollo 1 crew  Gus Grissom, Ed White
and the rookie Roger Chaffee  knew almost immediately that they'd been
assigned to a stinker. By late 1966, the last of the sturdy, two-man Gemini
spacecraft had flown, and NASA was rolling out the three-man Apollo ships
that would, at last, carry men to the moon. The spacecraft were
sweet-looking machines, but in test-runs on the pad, they were a mess. The
electrical system fritzed, the communications died, repairs and upgrades
were late in coming. At the end of one practice session, a disgusted Grissom
walked away from a simulator and left a lemon perched atop it. Most
worrisome, however, was NASA's insistence on continuing to use 100% pure
oxygen in its atmospheric systems  an explosively flammable gas that had
worked fine so far in the Mercury and Gemini ships but that could burn like
gasoline in the presence of so much as an errant spark. Sticking with pure oxygen meant NASA was banking on its luck to hold. It didn't. Early one Friday evening, when the
Apollo 1 astronauts were locked down in the spacecraft for a practice
session out on the pad, just such a spark got loose from a frayed wire next to
Grissom's seat. In less than a minute, all three men were dead.
For a while, it seemed, the Apollo program would perish too.